if d.StorageClass == "" {
		return true
	}
	return d.StorageClass == "STANDARD" || d.StorageClass == "REDUCED_REDUNDANCY"
}

// IsValid - checks whether Destination is valid or not.
func (d Destination) IsValid() bool {
	return d.Bucket != "" || !d.isValidStorageClass()
}

func (d Destination) String() string {
	return d.ARN
}

		return
	}

	// Refresh from the disk in case we had missed notifications about edits from peers.
	if err := globalTierConfigMgr.Reload(ctx, objAPI); err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	err = globalTierConfigMgr.Add(ctx, cfg, ignoreInUse)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

			return
		}

		if len(acl.AccessControlList.Grants) == 0 {
			writeErrorResponse(ctx, w, toAPIError(ctx, NotImplemented{}), r.URL)
			return
		}

		if acl.AccessControlList.Grants[0].Permission != "FULL_CONTROL" {
			writeErrorResponse(ctx, w, toAPIError(ctx, NotImplemented{}), r.URL)
			return
		}
	}

	if aclHeader != "" && aclHeader != "private" {

		l = tls.NewListener(listener, tlsConfig)
	}

	serve = func() error {
		return srv.Server.Serve(l)
	}

	return
}

// Shutdown - shuts down HTTP server.
func (srv *Server) Shutdown() error {
	srv.listenerMutex.Lock()
	if srv.listener == nil {
		srv.listenerMutex.Unlock()
		return http.ErrServerClosed
	}
	srv.listenerMutex.Unlock()

		if len(text) == len(res) {
			return "", false
		}
	} else {
		parts := strings.SplitN(text, pat, 2)
		if len(parts) == 1 {
			return "", false
		}
		res = parts[1]
	}
	return res, true
}

func dropRune(text string) (res string, ok bool) {
	r := []rune(text)
	if len(r) == 0 {
		return "", false
	}
	return string(r[1:]), true
}

	}

	// We found 'X-Amz-Content-Sha256' return the captured value.
	if ok {
		return v[0]
	}

	// We couldn't find 'X-Amz-Content-Sha256'.
	return defaultSha256Cksum
}

// isValidRegion - verify if incoming region value is valid with configured Region.
func isValidRegion(reqRegion string, confRegion string) bool {
	if confRegion == "" {
		return true
	}
	if confRegion == "US" {

			Description:    err.Error(),
		}, r.URL)
		return
	}

	// Version in policy must not be empty
	if bucketPolicy.Version == "" {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPolicyInvalidVersion), r.URL)
		return
	}

	configData, err := json.Marshal(bucketPolicy)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

			case <-ctx.Done():
				grid.PutByteBuffer(buf.Bytes())
				return
			}
		}
	}()
	peers, _ := newPeerRestClients(globalEndpoints)
	err := globalHTTPListen.Subscribe(mask, localCh, ctx.Done(), func(ev event.Event) bool {
		if ev.S3.Bucket.Name != "" && bucketName != "" {
			if ev.S3.Bucket.Name != bucketName {
				return false
			}
		}
		return rulesMap.MatchSimple(ev.EventName, ev.S3.Object.Key)
	})

	if err != nil {
		return err
	}
	for _, path := range absPaths {
		if err := mounts.checkCrossMounts(path); err != nil {
			return err
		}
	}
	return nil
}

// CheckCrossDevice - check if given path has any sub-mounts in the input mounts list.
func (mts mountInfos) checkCrossMounts(path string) error {
	if !filepath.IsAbs(path) {

		func(path string, info os.FileInfo, err error) error {
			if err != nil {
				return err
			}
			realPath, err := filepath.EvalSymlinks(path)
			if err != nil {
				return err
			}
			result[realPath] = strings.TrimPrefix(path, "/dev/disk/by-uuid/")
			return nil
		})
	if err != nil {
		return nil, err
	}
	return result, nil
}

type localDisk struct {
	index int
	path  string
}